Ahrefs tracked 37,500 citations across five AI tools (Google AI Mode, ChatGPT, AI Overviews, Gemini, Copilot), every day for 20 days.1 Between 50 and 83% of citations spotted on one day were gone the next, but about 75% of them returned within the 20 days.1 A citation that held for 8 days or more almost always came back (96 to 99%), while a one-day citation never returned in 34 to 41% of cases.1 Citations that last are mostly tied to Google rankings and a title that answers the question, far more than to domain authority or backlinks.1
Contents
Ahrefs asked the same questions every day, for 20 days, to five tools: Google AI Mode, ChatGPT, AI Overviews, Gemini and Copilot, then tracked about 37,500 citations spotted on day one to see which held, which disappeared, and which came back.1 The study, by Xibeijia Guan and Mateusz Makosiewicz, was published on October 29, 2026.1 This article covers what the study measured, how to read a missing citation, and what is associated with citations that last.
01Why a single check proves nothing
My colleague Xibeijia Guan asked five AI tools the same questions every day for 20 days, following every website cited on day one to see whether it was still cited the next day, and the days after that.1 The table below shows the scope of the tracking, tool by tool.
The scope of the tracking
| AI tool | Questions tracked | Websites cited on day one |
|---|---|---|
| Google AI Mode | 1,996 | 18,009 |
| ChatGPT | 3,173 | 11,225 |
| Google AI Overviews | 563 | 4,830 |
| Gemini | 1,276 | 1,994 |
| Copilot | 823 | 1,447 |
Ahrefs checked these results against questions it tracks daily in its own Brand Radar tool, on AI visibility and marketing conferences, to see whether the pattern held beyond the one month studied.1
Half or more of citations disappear by the next day
Across all five tools, at least half of the citations had disappeared by the next day: around 60% on Google AI Mode and ChatGPT, 50% on AI Overviews, 80% on Gemini and Copilot.1 Excluding answers that cited no website at all, which happens often on Gemini and Copilot, the five tools look more alike: 50 to 60% of citations disappear from one answer to the next.1
| AI tool | Gone by day two | Lasted a week or more | Lasted all 20 days |
|---|---|---|---|
| Google AI Overviews | 50% | 18% | 6.6% |
| Google AI Mode | 58% | 19% | 6.8% |
| ChatGPT | 59% | 13% | 4.0% |
| Gemini | 81% | 0.3% | 0.2% |
| Copilot | 83% | 1.9% | 0.5% |
Part of this churn comes from the searches an AI tool runs before answering: ChatGPT repeated the exact same searches as the previous day only 26% of the time.1 But even when the searches stayed the same, the cited websites changed 81% of the time, against 91% when the searches changed, which points to much of the churn happening after the search, when the AI decides which pages to cite.1
Most lost citations come back
A missing citation is not necessarily gone for good. Across the five tools, about 75% of citations that disappeared at least once returned within the 20-day study, half of them within three days.1 Only 20 to 27% of websites cited on day one disappeared and never returned during the study, depending on the tool.1
02How to count citations over several days
A single check in ChatGPT or AI Overviews says almost nothing: a missing citation on any given day has a good chance of coming back. Ahrefs recommends counting over a window of several days instead.1
Counting the days cited over the last seven days
Ahrefs' recommendation fits in one sentence: for each question tracked, count how many of the last seven days the website was cited, instead of judging from a single check.1
Judging a drop by what came before it
The longer a citation held before disappearing, the more likely it is to return.1 A citation that lasted just one day never comes back in 34 to 41% of cases depending on the tool, against 4 to 10% for a citation that lasted two to seven days, and only 0.7 to 4% for one that lasted 8 to 14 days.1 The day after a drop, only 14 to 25% of one-day citations return, against 69 to 87% of citations already in place for eight days or more.1 A brand-new citation should not be counted as a win before it has held for several days, and a long-standing citation that disappears is worth waiting on before reacting.1
Telling a real loss from measurement noise
More than half of Gemini's and Copilot's answers cite no website at all, which makes their citations look less stable than those of Google or ChatGPT, which almost always cite sources.1 On these two tools, a missing citation is worth checking first: did the AI cite someone else that day, or no one at all?1 The brand name can also stay in the answer after the link disappears: on Gemini, 40% of citations lost the next day still kept the brand name in the text, against 4% that kept the link but lost the name.1
Tracking these citations needs a tool that holds up over time. Even paid tools have blind spots: Semrush told customers it will stop tracking Copilot on November 9, 2026, because Microsoft's new sign-in requirements prevent it from collecting the data it needs, leaving eight tracked platforms instead of nine.2 Tracking for ChatGPT, Gemini and the other covered tools continues unchanged.2
03What makes a citation last
Ahrefs compared pages whose citations held for a long time with pages whose citations disappeared quickly, across several SEO metrics. These are correlations: they show a common trait of lasting citations, without explaining what causes it.1
Google rankings and organic traffic matter more than domain authority
Pages that already rank in Google and get search traffic keep their AI citations longer.1 On AI Overviews, pages cited for 15 days or more had a median of 88 estimated monthly visits from organic search, against 8 for pages cited for only one day.1 Domain Rating and backlinks made little difference: long- and short-lived citations came from similarly strong websites, with a typical DR of 64 to 78 either way.1
On AI Overviews and AI Mode, a page that ranked in Google for the same question was about seven times more likely to keep its citation for at least a week: 29% against 4% on AI Overviews, 28% against 4% on AI Mode. The gap was smaller on ChatGPT, 11% against 4%.1 It is one of the arguments that bring classic SEO closer to generative engine optimization: the basics that get a page into Google also help it stay cited by AI tools.
A title that answers the question, a small but real edge
Ahrefs also scored, from 0 to 1, how closely each page's title and meta description matched the question asked. On AI Overviews and AI Mode, the typical score rose from 0.54 for one-day citations to 0.65-0.68 for citations lasting 15 days or more.1 On ChatGPT, the link was much weaker: pages cited for one day and those cited for two to seven days scored almost the same, 0.54 and 0.56.1 Checking that titles and meta descriptions answer the targeted question is part of a standard on-page audit, whether or not an AI ends up citing the page.
Watch your own numbers instead of a screenshot
Both findings line up with what already applies to the limits of rank-tracking tools: a single chart or screenshot does not replace tracking over time, built on your own data rather than a one-off check inside an AI tool.